Stacker



` L. E. LA BOMB A`RD AND NI. H. SIDEBOTHAIV.

STACKER.

APPLICATION 111.150 AP11.6.1921.

Patented 001. 31, 1922.,

2 S H E ETS ,space. V general type require a certain amount` 'otlongitudinal exposed` surface for attendants t0 gather up the articlesafter they leave the oa. ai, iena arras LEGE' BDB/IBARD AND MELVIN H.SDEBTHAM, @F CHELSEA, MASSACHUSETTS,

ASSJIGNGRS T0 SPECIALTY AUTOMATEC MCHNE GMPANY, 0F CHELSEA, MASSA.-UHllJ'SjlElllUS, .di CORIPRATIN 0F MASSACHUSETTS. v

sracnna.

Application tiled april a,

.To all' whom t may con/0cm.' f

Ble it known that we, Laon E. i A'BoMnA-nn and MELVIN H. SIDEBOTHAM,citizens of the United States, and residents of Chelsea, in

y blanks: into lfolded boxes. Such a machine is illustrated in LettersPatent No. 1,345,899, granted July 20, 1920 to Leon E. La Bombard, andanother ltype of folding machine is illustrated in our ap lication filedJuly 2,

1921, serial No. 4.82, ai.

1n stacker mechanism of the general type illustrated in the patentreferred to, the folded blanks issue from the machine which folds them,onto a. slowly moving receiving belt, the folded blanks passing througha throat between lsaid receiving belt and an upper relatively inclined-belt and accumulating in overlapped condition and then passing under apressin belt which holds the row of overlapping blanks under pressurelong enough for the glue to set.

@ne of the objects of the present invention is to provide means whichwill effect quick and positive movement of each folded blank tothe nipof the pressing and receiving belts so as to keep the throat clear byensuring the movement of each blank out of the way of the next followingblank.

Another object is to provide means for so 'varying the shape andy sizeof the throat as to enable the machine to o crate properly upon blanksof Widely di' erent sizes and grades or qualities of material.

lncidental to the last stated object is the further one of providing forvarying adjustments of the throat without necessitating longitudinaladjustment of the parts, thereby enabling a shorter stacker than usualto to be employed, resulting in a saving of This is becausea l stackersof this 1921. Serial Elo. $559,134.

presser belt. Obviously any structure which i requires longitudinaladjustment of the parts above thereceiving belt to provide for largesizes of blanks necessitate along lower belt in order to furnish theexposed surface mentioned.

l With the above and 'other minor objects 1n view, the present inventionconsists in the construction and combination of parts substantial'1y ashereinafter described. andv claimed.

Of the accompanying drawing:

Figure 1 isa broken out perspective View of so much of-our improvedstacker as is necessary to an understanding of the same, it beingunderstood that arts at the rear which would merely `dup icate partsillus#| trated are omitted.' j

Figure 2 is a detail sectional elevation.

Figure B is a similar view illustrating an adjustment whenlarger blanksare being operated upon. i

1n Fi ure 1 `a portion of the frame ot a bok foldging machine isindicated at 10. lin

each of Figures 1, 2 and 3 the rolls which deliver the folded blanks atothe stacker are shown at 11,12.

The travelling platform or receiving belt 13, toward which the blanksare delivered by the rolls 11, 12, is mounted at one end on, and isldriven by, a drum 14 (ll ig. 1) which is operated at a slow speed by.power through suitable gearing in a gear case 15. its such gearing is.illustrated and described in the to is necessaryV herein.

rl`he shaft of the outer roll 16 for the belt 13 is mounted in 'bearingsprovided therefor in the outer end of a frame 17 having belt supportingrolls 18 and a flat support such as a series of boards 19. The outer endof the frame 17 is `pivotally supported at a fixed height, as by a pairof legs a portion of Patent 1,346,899, no detailed reference therewhichis shown at 20, said leg having a sleeve :21 enclosing a pivot pin orstu projecting from the frame. The inner end of the frame, theendnearest the drum 1d, is verticali adjustable as by mechanism shown inllig. 1, 23 being a. bracket secured to the frame. The bracket has avertical lll@ slot 2a through which a shaft 25 extends,- Y

said @aft carrying a pinion 26 engaging a rack 27 wlrried by thebracket. detent pawl 28 loosely mounted on the shaft 25 and having ahandle pin `29 is adapted to lengage the 'rack 27. lt is to beunderstood 2 and 3. To maintain the belt 13 at proper tension under alladjustmentsot the trame 17 suitable tensioning means are em loyed suchas a gravity roll 3l (Fig. i) carried by pivoted arms one of which isshown. at 32.

The upper or pressing belt 33, under some adjustments, presents a partof the upper wall of the throat ai, as indicated in Figure 3. Tofacilitate the attaining of this result, a hinged frame bar 33 isemployed,

lsaid bar having a hub 34 mounted on a pivot rod or shaft 35. Inpractice the rod 35 is screw-threaded and the hub is inn ternallythreaded so that by rotating the rod the lateral position oit the framebar may be adjusted. For present purposes it may' be assumed that thebar 33 is laterally positioned by sliding the hub 34 along the rod 35. y

Mounted on a stud or axle 36 projecting from one side ofthe frame bar 33near its outer end is apulley .or driving drum 3T on which the outer endof the belt 38 is mounted, the inner endy of the belt being mounted on aroll or wide pulley 39 idly mounted on a pin projecting from an arm 40.

whichis tree to rise and fall as presently explained. A sprocket 41operatively com nected with the pulley or driving drum 37 is driven by achain 42 passing over idle guide rolls 43 carried by the frame bar 33.The chain isdriven b a sprocket 44 carried by a shaft 45 on whlch thearm 4G- is pivotally supported so that said arm is tree to gravitatetoward the lower belt 13. The shat't 45 has a gear 46 meshing with agear 47 the latter having a sprocket 48 driven by a chain 49 from anysuitable part of the machine such as a small sprocket connected with theshaft ofdrum 14. For present urposes it is suiicient to state that theIlu'elt 38 is driven, through the gearing referred to, at the same slowspeed as the belt 13.

Owing to the fact that the pressing belt 38 is driven in the mannerdescribed, the lower or actin stretch of said belt is kept taut andthere ore .ensuresl even and uniform pressure on the blanks.

To keep the belt 38 under proper tension we employa tightener roll50carried kby an adjustable arm consisting of two sections 51, 52,having a clamp jointy 53,'the .section 63 is not menoretance of thetightener roll 50rom the belt pulley 37 is varied by changing theangular relationship of the sections 51, 52, and the degree of pressure,of said roll on the belt is varied by shifting the weight 53 along thearm 57. K

We will now describe the mechanism for locating the folded blanks a tsuccessively in the throat w. The hub 59 oi an arm 60 is freelymountedon the shaft 45 and has a longitudinally adjustable extension, 61carrying a' roll 62o A belt 63 is mounted on said roll 62 and on. a roll64 which is freely mounted on the shaft 45 between the hubs or arms and46. Therefore the belt ositively driven by any toothed gearing. "t isfrictionally driven by a roll which bears on a portion of the belt.running on the roll 64, and alsobears on the upper deliver roll 11.ylfhe belt 63 is therefore frictiona ly driven at approximately the samerelatively hi h speed as that ot the travel of the blans while beingdelivered from the folding machine.

rlhe friction roll 65 1s carried by a yoke 66 pivotally connected at 67to a link 63 which, 1n turn, is pivotally supported on a rod 69 mountedin a casting 70., The castin 70 is slidably mounted on both of the memers 35, 45 so as to be laterally adjustable thereon.- A spring 71 coiledaround a guidepinfl 72 rising from the casting through a hole in thelink 70 is confined between an adjustable collar 73 and the top ofthelink and serves to cause the roll 65 to bear with sutlicient pressure onthe roll 11 and belt 63 to effect proper frictional drive of the belt. y

Since the arm 60, 61, is mounted freely on the shaft 45 it is desirableto adjustably limit its downward movement. This, in the machineillustrated, is provided for by a hook stop 75. the vertical portion ofwhich is adjustable in an arm 74 of the casting- 70. The lower endofsaid stop hooks under a pin 76 (Fig.l l) projecting from the side ofthe arm 60.

Adjustably mounted on the pin 76 is a short rod 77 to the lowerendofwhich is secured a stud shaft 78 on which is freely mounted a roll 79having a multi lieity` of rows of small pins. The roll 79, being freelyi mounted, is'rotated by the blanks carried `over it by the belt 63.`This roll forms an important feature of our invention as will presentlybe explained.4 Preferably the roll, or at least its pins, isof-non-metallie material such as rubber, to avoid indenting the rear.edges of the folded blanks. The roll Maaate isso mounted as to Contactwith the 'under side of the lower stretch of the belt 63 Vthe pressureot' which on the roll is yieldingly counterbalanced by a spring 80connected at its lower end to the arm 60 and at its upper end to a pin81 projecting from a collar vertically adjustable on a rod 82 risingfrom the arm 74@ of the casting 70.

ln order that all of the parts just described may be laterally adjustedwith the bar 33, the rod 69 (Fig 1)' has a connection at 83 with saidbar.

When the parts so far described are adjusted as illustrated in Figures 1and 2, and the machine is in operation, the folded blanks a; a followeach other in rapid succes-v sion between the rolls 11, 12 and passbetween the belt 63 andthe in roll 79. As stated, said belt and roll wilmove at practically the same speed as the blanks. The front edge of eachblank is de'lected down by thebelt 63 onto the belt 13 .or onto thepreceding blank. 'll` he adjustable support for the pin roll consistingof the members 76, 77, 7 8 (Fig. l) enables said roll to be set at theproper distance from the belt roll 39 to act properly upon the blanks sothat, when the front edge of each blank reaches the nip of belt 38 theblank will be quickly pushed to overlapping position. words, when thefront edge of. a folded blank or box a reaches the belt 38 which ismoving slowly, the` rear edge of that blank is' engaged by some of thepins of the roll 79 and the front edge ofthe blank is tucked snuglyunder the belt 38-and the rear edge is so acted upon that the blank isslightly bent and snapped down onto the belt 13 or onto a precedingblank. ln this manner the rear edge of each blank is quickly shifted outof the way of, the' one rapidly approaching behind it.'A The describedadjustable mounting of the pin roll enables the latter to be set toproperly act on supplies of blanks differing in length. Sometimeshowever it is desirable'to adjust for blanks of consider-A ably greaterlength, in which case the size of the throat a" should be considerablyincreased. For this purpose the machine is equipped with two otherelements which may be either on the machine in displaced position orentirely removed when not needed t'or use. These elements are shown inFigure 3 and omitted from Figures 1 and 2 to avoid confusion. @ne ofsaid elements consists of a slide 84 adjustably secured to the bar 33 asby a screw, a jointed arm pivotallyconnected to said slide andconsisting of two sections 85, 86, connected by a clamp joint 87, andhaving a roll 88 to bear on and deflect the lower stretch of the belt38. The other eement yconsists of a block 89 adjustably clamped on thebar 33, and a rod 96 havinga hook 91,'the rod being verticallyadjustable 1n the block 89. By engaging the book 91 with,

lin other c the under side of the arm l0 the belt roll 39 can be held atany required point of elevation, and by means 0f the roll 88, thestretch of the belt 38 between rolls 39, 88, can be caused to travel insuch position lof inclination as to provide a throat :v for blanks of'much greater length than when the machine is adjusted as in F ig. 2. Theoperation of the machine is the same when adjusted as in Figure 3, asabove described in connection with Figure 2, but much longer. blanks canbe operated upon. Since no longitudinal adjustment of the belt 38 isever required there is always ample space on the belt 13 beyond the belt38 for' the attendant to gather up the blanks the glue laps of which thedelivering rolls 11, 12, is that it facili tates the securing of aproper tapering shape of the throat especially when the machine is usedas illustrated in Figure 3.

'llhe weight of the trame arm 33 and parts carried thereby is suticientto cause the belt 38 to bear on the row of overlapped folded blanks withsuihcient pressure to hold the glued. laps of the blanks in rm contact-while the glue is setting.

Having now described our invention, we claim:

1. Mechanism of thecharacter described, comprising a receiving belt,means for depositing articles thereon in overlapping superposedrelationship, a i pressing belt mounted to cause a portion of it tocoact with the receiving belt in forming the nip end of a throattraversed by the blanks, and

'means for adjusting the pressing belt'to vary the length of said throatwithout changing the longitudinal position of the pressing belt. y

2. Mechanism of the character described comprising a receiving belt,means for depositing articles thereon in overlapping superposedrelationship, a pressing belt pivotally mounted to gravitate toward thereceiving belt, and a positively driven pulley for the outer end ot thepressing belt to keep the acting stretch of said belt taut.

3. Mechanism of the character described, comprising a receiving belt,means for depositing articles thereon in overlapping superposedrelationship, means forl exerting pressure on said belt, and means forvertically adjusting an inner portion of said belt.

e. Mechanism ofthe character described lltl@ llt) comprising a receivingbelt, means for depositing articles thereon in overlapping superposedrelationship, a frame for said belt,

means for pivotally supporting the outer end of said frame, and meansfor swinging the frame on its pivotal support.

5. Mechanism of the character described, comprising a frame carrying areceiving belt, means for depositing articles on the belt near one endthereof, said frame being positing articles thereon in overlappingsuperposed relationship, and means for engaging the rear edge of eachdeposited article to urge said edge downward tcward the receiving belt.

8. Mechanism of the character described, comprising a receiving belt,means for depositing articles thereon in overlapping su-l perposedrelationship, and a rotary member having projections to engage the rearedge of each' deposited article and urge it downward toward the receivinbelt.

9. Mechanism of the c aracter described, comprising a receiving belt,means for depositing articlesthereon in overlapping su perposedrelationship, and a roll having resilient projections to engage the rearedge of each deposited article and urge it downward toward the receivingbelt.

10. Mechanism of the character described comprising` a receiving belt, apressing belt mounted to gravitate toward the receiving belt, means fordelivering articles onto the receiving belt, and means for variablydelecting that portion of the pressingy belt at the endtoward which thearticles are delivered.

11. Mechanism of the character described, comprising a receiving belt, apressingfbelt mounted to ravitate toward the receiving belt, means ordelivering articles onto the receiving belt, and an adjustable rollmounted to bear on the upper surface of the lower stretch of thepressing belt.

12. Mechanism of the character described, Lcomprising a receiving belt,a pressing belt mounted to gravitate toward the receiving belt, meansfor deliveringl articles onto .the receiving belt, a verticallyadjustable roll for supporting, the inner end of the pressing belt,andan adjustable roll mounted to bear echa-nismofr the characterdescribed,V comprising a receiving belt, means for de` on the uppersurface of the lower stretch of the pressing belt.

13. Mechanism of the character described, comprising a receiving belt,means for delivering articles thereon in. overlapping superposedrelationship, a pivoted bar projecting over the receiving belt, a pulleycarried byI said bar, and a/pressingbelt running on said pulley.

14. Mechanism of the character described, comprising a receivingbelt,means for delivering articles thereon in overlapping superposedrelationship; a pivoted bar projecting over the receiving belt, a pulleycarried by said bar, a pressing belt running' on said pulley, anddriving connections extending along the bar to said pulley.

15. Mechanism of the character described, comprising a receiving belt,means for delivering articles thereon in overlapping superposedrelationship, a laterally adjustable pivoted bar projecting over thereceiving belt, a pulley carried by said bar, and a pressin belt runningon said pulley.

16. echanism of the character described, comprising a receiving belt,means for delivering articles thereon in overlapping superposedrelationship, a pivoted bar projecting over the receiving belt, a pulleycarried by said bar, a pressing belt running on said pulley, and a'beltvtightener supported by said bar.

17. Mechanism ofthe character described, comprising a receiving belt,means for delivering articlesV thereon in overlapping superposedrelationship, a pivoted bar projecting over the receiving belt, a pulleycarried by said bar, a pressing belt running on said pulley, and accunterbalanced arm supported by said bar and having a roll bearing onthe upper stretch of. the pressing belt.

18. In mechanism of the character dei scribed, a platform, means foradvancing flat articles in a plane above lsaid platform, a balanced armcarrying a roll above the platform, a belt running over said roll means`for,adjustably .limiting the lower position t which said arm can swing,and means for frictionally driving the belt.

21. In mechanism of -the character described, a platform, means foradvancing dat articles in a lane above said platform,

a b elt for deiectmg the articles toward the platform, means forfrictionall driving the belt, and a roll on which the ower stretch ofthebelt bears.

22. vIn mechanism of the character described, a platform, means forvadvancing flat articles in a plane above said platform, and africtionally drivenbelt and a roll having peripheral projections, saidbelt and roll being located to take the advancing articles between themand deiiect them toward the platform.

23. Mechanism of the character described comprising a receiving belt,means for depositing articles thereon in overlapping superposedrelationshi and a pressing belt, both of said belts belng verticallyadjustable. f,

24. Mechanism of the character described comprising a receiving belt.,means for depositing articles thereon in overlapping superposedrelationship, and a pressing belt,

both of said belts being laterally adjustable as a unit.

25. Mechanism of the character described comprising a receiving belt,means for depositingarticles thereon in overlapping superposedrelationship, a pivoted member, and `a pressing belt supportedA by saidpivoted member.

26. Mechanism of the character described comprising a receiving belt,means for depositing articles thereon in overlapping superposedrelationship, a pivoted member having a pulley, ya pressing" beltmounted at one end on said pulley, and driving connections extendingfrom the pivoted end of said member to the pulley.

In testimony whereof We have atlixed our signatures.

LEON E. LA BOMBARD. MELVIN H. SDEBOTHAM.

